Amlodipine besylate tablets are not controlled release tablets. Controlled release tablets work by releasing the medication at a constant rate to achieve an effective blood level and thus a smooth onset of action. Amlodipine benzenesulfonate is not a controlled release tablet because it does not have this characteristic. This product belongs to the calcium channel blocking class of prescription drugs. Clinically, it is mostly used in the treatment of variant angina pectoris, chronic stable angina pectoris, essential hypertension and other diseases. This product is mainly used to achieve the therapeutic purpose by antagonizing calcium ions, dilating coronary arteries and peripheral small arterial vessels, and relaxing the smooth muscle of blood vessels. After taking amlodipine benzenesulfonate tablets, adverse reactions such as dizziness, headache, palpitations (rapid heartbeat, often accompanied by panic) may occur. If patients experience adverse reactions, they need to seek prompt medical attention. Amlodipine benzenesulfonate tablets are contraindicated for those who are allergic to the ingredients of this product and those who are allergic to dihydropyridine drugs. When taking amlodipine benzenesulfonate tablets, you should strictly follow the doctor’s instructions, do not change the drug regimen on your own, and should go to the medical institution to find out the cause of the discomfort after taking the drug.